找规律填空 1,3,7,13,21,() 64,48,40,36,() )

问题描述:

找规律填空 1,3,7,13,21,() 64,48,40,36,() )

1+2=3,3+2*2=7,7+2*3=13,13+2*4=21,21+2*5=31,